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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>PROF ITAI SENED</PersonNm>
        <TitleTxt>COUNCIL MEMBER</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>PROF DR KAZUHIKO TAKEMOTO</PersonNm>
        <TitleTxt>COUNCIL MEMBER/CHAIR (AS OF 01/24)</TitleTxt>
        <AverageHoursPerWeekRt>4.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DR KIL-CHOO MOON</PersonNm>
        <TitleTxt>COUNCIL MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>4.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DR EVA FALLETH</PersonNm>
        <TitleTxt>COUNCIL MEMBER (AS OF 01/24)</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>PROF VLADISLAV PANCHENKO</PersonNm>
        <TitleTxt>COUNCIL MEMBER</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>PROF DR LUBICA LACINOVA</PersonNm>
        <TitleTxt>COUNCIL MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>4.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DR SEPO HACHIGONTA</PersonNm>
        <TitleTxt>COUNCIL MEMBER</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DR JOHAN KUYLENSTIERNA</PersonNm>
        <TitleTxt>COUNCIL MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>4.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>PROF OLENA BORODINA</PersonNm>
        <TitleTxt>COUNCIL MEMBER</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>DR SARAH WEBB</PersonNm>
        <TitleTxt>COUNCIL MEMBER/VICE CHAIR</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>PROF DEBRA KNOPMAN</PersonNm>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>DR QUYNH LIEN LE</PersonNm>
        <TitleTxt>COUNCIL MEMBER</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MAG CHRISTIANE POHN-HUFNAGL</PersonNm>
        <TitleTxt>CHIEF OPERATIONS OFFICER</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <OfficerInd>X</OfficerInd>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>DR KEYWAN RIAHI</PersonNm>
        <TitleTxt>PROGRAM DIRECTOR</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>PETR HAVLIK PHD</PersonNm>
        <TitleTxt>PROGRAM DIRECTOR</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>175904</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>DR ELENA ROVENSKAYA</PersonNm>
        <TitleTxt>PROGRAM DIRECTOR</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>STEFFEN FRITZ</PersonNm>
        <TitleTxt>PROGRAM DIRECTOR</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>FABIAN WAGNER</PersonNm>
        <TitleTxt>PROGRAM DIRECTOR</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>2114</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>1839329</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
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      <IndivRcvdGreaterThan100KCnt>29</IndivRcvdGreaterThan100KCnt>
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      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>HYDROPHIL GMBH</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <ForeignAddress>
            <AddressLine1Txt>MARIAHILFER STRASSE 84</AddressLine1Txt>
            <CityNm>WIEN</CityNm>
            <CountryCd>AU</CountryCd>
            <ForeignPostalCd>1070</ForeignPostalCd>
          </ForeignAddress>
        </ContractorAddress>
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      <TotalContributionsAmt>9466643</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
        <Desc>CONTRACTS &amp; GRANTS</Desc>
        <BusinessCd>900099</BusinessCd>
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      <TotalProgramServiceRevenueAmt>20809656</TotalProgramServiceRevenueAmt>
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        <ExclusionAmt>509210</ExclusionAmt>
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      <RoyaltiesRevenueGrp>
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        <ExclusionAmt>443</ExclusionAmt>
      </RoyaltiesRevenueGrp>
      <OtherRevenueMiscGrp>
        <Desc>EXCHANGE GAIN</Desc>
        <BusinessCd>900099</BusinessCd>
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        <ExclusionAmt>212558</ExclusionAmt>
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      <OtherRevenueMiscGrp>
        <Desc>ACCRUALS REVERSAL</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>178208</TotalRevenueColumnAmt>
        <ExclusionAmt>178208</ExclusionAmt>
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      <OtherRevenueMiscGrp>
        <Desc>SPEAKING ACTIVITIES</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>164405</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>164405</RelatedOrExemptFuncIncomeAmt>
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      <MiscellaneousRevenueGrp>
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        <ExclusionAmt>55742</ExclusionAmt>
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      <TotalRevenueGrp>
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        <RelatedOrExemptFuncIncomeAmt>20974061</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>956161</ExclusionAmt>
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      <ForeignGrantsGrp>
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        <ProgramServicesAmt>29654</ProgramServicesAmt>
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      <CompCurrentOfcrDirectorsGrp>
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        <ProgramServicesAmt>510258</ProgramServicesAmt>
        <ManagementAndGeneralAmt>519645</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>16386610</ProgramServicesAmt>
        <ManagementAndGeneralAmt>4859737</ManagementAndGeneralAmt>
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      <OtherEmployeeBenefitsGrp>
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        <ProgramServicesAmt>4278979</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1409842</ManagementAndGeneralAmt>
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      <FeesForServicesLegalGrp>
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        <ProgramServicesAmt>58</ProgramServicesAmt>
        <ManagementAndGeneralAmt>82325</ManagementAndGeneralAmt>
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      <FeesForServicesAccountingGrp>
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        <ProgramServicesAmt>26635</ProgramServicesAmt>
        <ManagementAndGeneralAmt>75292</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>1160810</ProgramServicesAmt>
        <ManagementAndGeneralAmt>68232</ManagementAndGeneralAmt>
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      <AdvertisingGrp>
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        <ProgramServicesAmt>6155</ProgramServicesAmt>
        <ManagementAndGeneralAmt>17165</ManagementAndGeneralAmt>
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      <OfficeExpensesGrp>
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        <ProgramServicesAmt>148722</ProgramServicesAmt>
        <ManagementAndGeneralAmt>260333</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>84268</ProgramServicesAmt>
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        <ProgramServicesAmt>4960</ProgramServicesAmt>
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        <ProgramServicesAmt>468011</ProgramServicesAmt>
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        <ManagementAndGeneralAmt>707070</ManagementAndGeneralAmt>
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        <ManagementAndGeneralAmt>55025</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>5548</ProgramServicesAmt>
        <ManagementAndGeneralAmt>180780</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
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      <OtherExpensesGrp>
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        <ManagementAndGeneralAmt>96168</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
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        <ManagementAndGeneralAmt>14122</ManagementAndGeneralAmt>
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      <AllOtherExpensesGrp>
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        <ManagementAndGeneralAmt>23874</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>24149515</ProgramServicesAmt>
        <ManagementAndGeneralAmt>9688687</ManagementAndGeneralAmt>
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        <EOYAmt>20811036</EOYAmt>
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        <EOYAmt>5199885</EOYAmt>
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        <EOYAmt>21413</EOYAmt>
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        <EOYAmt>1669929</EOYAmt>
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        <EOYAmt>2624296</EOYAmt>
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        <EOYAmt>30326559</EOYAmt>
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        <EOYAmt>4446867</EOYAmt>
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        <EOYAmt>17300603</EOYAmt>
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        <EOYAmt>1003849</EOYAmt>
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      <TotalLiabilitiesGrp>
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        <EOYAmt>22751319</EOYAmt>
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        <EOYAmt>5897005</EOYAmt>
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      <DonorRestrictionNetAssetsGrp>
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        <EOYAmt>1678235</EOYAmt>
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        <EOYAmt>7575240</EOYAmt>
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      <TotLiabNetAssetsFundBalanceGrp>
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        <EOYAmt>30326559</EOYAmt>
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      <InfoInScheduleOPartXIInd>X</InfoInScheduleOPartXIInd>
      <ReconcilationRevenueExpnssAmt>-2441337</ReconcilationRevenueExpnssAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleA documentId="RetDoc1039100001">
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      <GiftsGrantsContrisRcvd509Grp>
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        <CurrentTaxYearMinus3YearsAmt>12920212</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>11677700</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>10990800</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>9466643</CurrentTaxYearAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>AS THE GOVERNING BODY OF THE INSTITUTE, THE IIASA COUNCIL IS COMPOSED OF ONE PERMANENT REPRESENTATIVE FROM EACH NATIONAL MEMBER ORGANIZATION (NMO). THE COUNCIL MEETS TWICE A YEAR, IN JUNE AND NOVEMBER. THE CHARTER AND SUBSEQUENT RESOLUTIONS OF COUNCIL DOCUMENT THE ROLE OF COUNCIL, ITS PROCESSES AND DECISIONS. THE COUNCIL IS RESPONSIBLE AMONG OTHERS FOR: ESTABLISHING RELATIONS WITH GOVERNMENT AND INTERNATIONAL BODIES; APPROVING THE ADMISSION OF NMOS, APPROVING THE BUDGET AND SUBJECT AREAS FOR IIASA RESEARCH; AND ENSURING IIASA ACTIVITIES ARE IN LINE WITH ITS OBJECTIVES, THE PROVISIONS OF THE CHARTER, AND THE INTERESTS OF THE NMOS. THE COUNCIL ELECTS A CHAIR AND TWO VICE CHAIRS WHO ARE THE OFFICERS OF THE COUNCIL FOR A PERIOD OF THREE YEARS. THE COUNCIL APPOINTS THE DIRECTOR GENERAL/CHIEF EXECUTIVE OFFICER, THE DEPUTY DIRECTOR GENERAL FOR SCIENCE AND THE CHIEF OPERATIONS OFFICER (THE EXECUTIVE TEAM) WHO ARE RESPONSIBLE FOR, AMONG OTHERS, PROVIDING AN ENABLING ENVIRONMENT FOR EXECUTING THE MANDATE AND THE STRATEGIC INTENT OF IIASA AS AN INTERNATIONAL RESEARCH INSTITUTION, PROVIDING AN APPROPRIATE STRUCTURE OF THE ORGANIZATION TO FULFILL ITS MISSION, IMPLEMENTING THE RESEARCH PROGRAM AND MANAGING THE DAY-TO-DAY OPERATIONS. THE EXECUTIVE TEAM, WHILE NOT A MEMBER OF THE COUNCIL, IS ENTITLED TO PARTICIPATE IN ALL ITS DELIBERATIONS, EXCEPT THOSE WHICH CONCERN THEIR TENURE. IT DOES NOT, HOWEVER, HAVE THE POWER TO MAKE DECISIONS ON BEHALF OF THE GOVERNING COUNCIL. THE IIASA GOVERNING COUNCIL EXERCISES ITS OVERSIGHT RESPONSIBILITIES THROUGH A COMMITTEE STRUCTURE: AN EXECUTIVE COMMITTEE, A FINANCE, RISK AND AUDIT COMMITTEE, A MEMBERSHIP COMMITTEE, RESEARCH AND ENGAGEMENT COMMITTEE, AN EXTERNAL SCIENCE ADVISORY COMMITTEE AND EXTERNAL EVALUATION COMMITTEES. ALL PRINCIPLE DECISIONS ARE DOCUMENTED, REPORTED AND RATIFIED BY THE IIASA GOVERNING COUNCIL.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION HAS MEMBERS CALLED THE NATIONAL MEMBER ORGANIZATIONS (NMOS). MEMBERSHIP IS OPEN TO ONE PROFESSIONAL INSTITUTION FROM ANY COUNTRY/REGION PROVIDED THAT THE INSTITUTION IS REPRESENTATIVE OF THE RELEVANT SCHOLARLY COMMUNITY OF THE COUNTRY; SUBSCRIBES TO THE IIASA CHARTER; RESPECTS THE INTERNATIONAL CHARACTER OF THE INSTITUTE; AND OBSERVES THE CONDITIONS OF MEMBERSHIP IN THE IIASA CHARTER ARTICLE IV. MEMBERSHIP IS SUBJECT TO APPROVAL OF THE COUNCIL.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>A MEMBER INSTITUTION ELECTS ITS OWN REPRESENTATIVE (COUNCIL MEMBER) WHO SERVES AS A VOTING MEMBER OF THE COUNCIL. COUNCIL MEMBERS WORK ON A VOLUNTARY BASIS AND NO REMUNERATION IS PAID OUT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S ACCOUNTING PERSONNEL PREPARE ITS FORM 990, WITH THE ASSISTANCE OF THE FINANCE AND SPONSORED RESEARCH OFFICE (FSR), THE HUMAN RESOURCES DEPARTMENT (HR) AND THE EXTERNAL RELATIONS COMMUNICATIONS AND LIBRARY (ERCL). THE RETURN IS THEN REVIEWED BY AN INDEPENDENT ACCOUNTANT AS WELL AS THE ORGANIZATION'S DIRECTORATE TEAM. ANY NECESSARY REVISIONS ARE INCLUDED IN THE FINAL VERSION THAT IS APPROVED BY THE DIRECTOR GENERAL AND THE HEAD OF FSR.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>IIASA'S CONFLICT OF INTEREST POLICY IS PRIMARILY CONCERNED WITH FORMAL OUTSIDE EMPLOYMENT AND ACTIVITIES THAT MAY BE IN CONFLICT WITH THE INTERESTS AND MISSION OF THE INSTITUTE. THE AIM IS THAT THE INSTITUTE RECEIVES SUFFICIENT INFORMATION TO ARRIVE AT A REASONABLE DECISION AS TO THE APPROPRIATENESS OF PROPOSED ACTIVITIES. THIS POLICY EQUALLY APPLIES TO ALL INSTITUTE PERSONNEL AT ALL LEVELS. INDIVIDUALS ARE REQUIRED TO REPORT ON THEIR INTERESTS IN, COMMITMENTS TOWARD OR AFFILIATION WITH OTHER ORGANIZATIONS THAT COULD CONSTITUTE A CONFLICT OF INTEREST IMMEDIATELY UPON ASSUMING A POSITION AT IIASA AND AGAIN DURING ANY SUBSEQUENT NEGOTIATIONS AT EMPLOYMENT CONTRACT EXTENSION (USUALLY EVERY TWO YEARS). IN THE INTERIM, EMPHASIS AND RESPONSIBILITY IS PLACED ON THE INDIVIDUALS TO UPDATE IIASA IN A TIMELY MANNER OF ANY CHANGES. WHILE IIASA DOES NOT SPECIFICALLY MONITOR RESEARCHERS IN THE PERIOD BETWEEN ORIGINAL HIRING AND CONTRACTUAL EXTENSIONS, THERE IS ALSO A FORMAL MECHANISM IN PLACE BY WHICH ANY OBSERVATION OF A POSSIBLE CONFLICT OF INTEREST CAN BE REPORTED TO THE DIRECTORATE AND HANDLED APPROPRIATELY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COUNCIL APPOINTS A DIRECTOR GENERAL, A DEPUTY DIRECTOR GENERAL FOR SCIENCE AND A CHIEF OPERATIONS OFFICER OF THE INSTITUTE FOR A TERM OF FIVE YEARS, WITH THE POSSIBILITY OF EXTENSION ACCORDING TO THE EMPLOYMENT REGULATIONS. THE DIRECTOR'S COMPENSATION IS NEGOTIATED (WITHIN A SALARY FRAMEWORK THAT IS COMMENSURATE WITH SIMILAR POSITIONS, EXPERIENCE AND QUALIFICATIONS) BETWEEN THE COUNCIL, THE EXECUTIVE COMMITTEE OF THE COUNCIL AND THE CANDIDATE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S FINANCIAL STATEMENTS, GOVERNING DOCUMENTS AND CONFLICT OF INTEREST POLICY ARE AVAILABLE TO THE PUBLIC UPON REQUEST, IN WRITING OR E-MAIL TO: FAB@IIASA.AC.AT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9, CHANGES IN NET ASSETS:</FormAndLineReferenceDesc>
        <ExplanationTxt>INTERNATIONAL INSTITUTE FOR APPLIED SYSTEMS ANALYSIS (IIASA) IS A NON-GOVERNMENTAL, MULTINATIONAL, NOT-FOR-PROFIT INSTITUTION, AND HAS ITS REGISTERED SEAT IN LAXENBURG, AUSTRIA. IIASA AND ITS STAFF MEMBERS ARE SUBJECT TO THE PROVISIONS OF AUSTRIAN LAW. THE BOOKS ARE KEPT IN EUROS (EUR), WHICH IS IIASA'S FUNCTIONAL AND PRESENTATION CURRENCY. THE RATES USED FOR 2024: 1 EUR = USD 1.082251; FOR 2023: 1 EUR = USD 1.082251</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>